LG 21FJ8AG Manual De Servicio página 22

TABLERO DE CIRCUITO IMPRESO
MAIN & CPT
CPT(option)
Copyright©2008 LG Electronics.Inc. All right reserved.
Only for training and service purposes.
DIAGRAMA EN BLOQUE
Option Par
t
IIC Bus Line
CPT DRIVE
MONO
MONO
SOUND AMP SOUND AMP
L-OUT
SPK1.
LA42101 9v
LA42101
SPK2.
From
STEREO, STEREO, R-OUT
Sound Max IC804
Sound Max
SOUND AMP.
SOUND AMP.
LA42102(N)
LA42102(N)
RIN-TV
18 2 5 9
23 9v
14 SDA
IC751 LA72730
SDA SCL IC751 LA72730
15 From
24 SCL
LIN-TV (STEREO Opt) (STEREO Opt)
IC804
3,6 11 1 4 7
21 19 20
R/L Out
9 10 17 18
IC701
BTSC
1 2 5 46~48
12 49
LA72702
RGB
Ext R/L
EXT RGB
OUT
IN
Video-in
9V
USOC
2 7
50 SPK L/R
51 OUT LA76213
LA76213
IC661
SIF IN SIF
A2/NICAM IF IN
5 54
out
57 56 64 61
LC75024E 8 33
27 26
SDA SCL
TV IN(ST)
9V
IF SAW SAW
From
AV1(V/R/L)-IN
IC804
Z102
5V
TUNER
Audio(Game)
33V Video(Game)
From USOC
5.1V
SDA
4,5,6 8 7
SCL
01+ ' Rear_AV(1) Rear_AV(1) SCART SCART
HIC291
Game Pack(Game Opt) ( PHONE) ( PHONE)
Game Pack(Game Opt)
AC
ST-BY INPUT
TRANS (100~240V)
(1W Opt)
AUDIO B+
9
IC04
(17V/11V)
ST-5V REG
SMPS
IC803 R620 TRANS
IC803 R620
IC804
12
5V 7.5V
5V 7.5V MONO
9V REG
( ~A43K )
STEREO
Monitor V OUT(ST) SOUND SOUND
R610
( ~ A43L)
5V 5V
5V
5v 9v 9v ST-5v
10.5V
From From From From
IC301 B+
IC803 IC804 IC804 IC04
(110/115V)
14
V_DY
62 19 9 24
IF H-Vcc VDD Vcc 17 6
V-OUT
24V
5V 5V 3.3V 5V
22
H-OUT
185V
2
AFC
10
Y(G)/Cr(R)/Cb(B) EW-OUT FBT
31 32 16 8 ABL
10 11 13
1
HEATER
9
Collector
SDA SCL
B+
3
IC02
EEPROM
24C04/16
HDT
Vcc
Q402
FBP in
V-in
ST-5V
MD1803
R,G,
B
JA01 IC401
TDA8145
EW IN
EW OUT
DVD DVD L401
(FLAT OPT.) (FLAT OPT.)
LGE Internal Use Only